Submarine mine.



G. E. ELIA.

SUBNIARINE MINE. APPglcAnoN FILED APR. 19. 191s.

Patented Sept. 19, 1916.

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GIOVANNI EMANUELE ELIA, OF WESTMINSTER. LONDON, GLAND, ASSIGNOR TO vVIQKIERS LIMITED, OFIONDON, ENGLAND.

-sUnMAnINE MINE.

Specification of Letters Patent. Patented Sept. I9, Iii.'

Application filed April 19, 1916. Serial No. 92,2'i0.

ELIA, a .subject ot the King of Italy, -residing at Vickers House, lhoadway, 'estminster, in'the county of London, England, have invented certain new and useful Improvements in or Relating to Submarine Mines, ot' which the following is a specification.

This invention relates to submarine mines inv which the anchor carries a cable drum .whose movement is controlled by a brake pawl and is arrested by a stop pawl which comes into operation when the plummet or sounding ball reaches 'the sea bed as is well understood.

According to this invention the brake and stop pawls are mounted upon a common bracket so that the pawls and bracket constitute a single unit which can be readily placed in position in the anchor without requiring the adjustments that are necessary when the pawls constitute two separate units; the improved arrangement is also less expensive to manufacture and is com- -posed ofe small number of parts. The

two pawls arearranged at one side of theanchor and operate upon only one of the flanges of the cable drum so that only one of the flanges need Abe formed with ratchet teeth; the pawls are also preferably controlledv by a. single spring interposed between tail pieces on the said pawls.

' In order that the said invention may be clearly understood and readilv carriedinto effect, the same will now be described vmore fully with reference to the accompanying drawings, in which:-f

is a sectional end elevation showing the lower part of aii'anchor provided with the improvements, and Fig. d is a section taken approximately on the line 1, 1 of Fig. 1.

A is the anchor, and Af is the cable drum having two flanges a., a. of which only the latter is provided with teeth.

B is the brake pawl and l is the stop pawl. C is the bracket upon which these pawls are pivated at and b respectively. '13", B"x are the tail pieces of the pawls and B2 is the spring interposed between these tail pieces.

The bracket C is attached by bolts or otherwise to the anchor. The spring B2 is carried by telescopic casings b", b* arranged in a hole in the bracket C; the outer ends y (ligt thBese casxngs bear against the tail pieces The 'plummet or sounding ball (not shown) is connected by aline D (Fig. 2) 60 to one arm of a lever D pivoted at d to the aforesaid bracket C. The otherar'm of this lever operates upon a spring controlled rod v D2 which is slidably carried by the bracket C and is cut away or made of smaller diameter at (l2. The weight of the plummet or Sounding ball during its descent in the water holds the parts in the position sl wn by Fig. 2 so that the stop pawl-B is prevented from engaging with the toothed flange a. b v reason of an arm b2 on this pawl bearing against that portion of the rod .Dil

which is of full diameter. lV-hen however the plummet or sounding ball reaches the sea bed its weight is taken oil' the lever Di'r and the spring of the rod D2 moves the latteiuntll its reduced portion (Z2 comes opposlte the arm Z of the pawl B', whereupon the latter is free to be moved by then spring B2 into engagement with the teeth 80 on the flange a. to prevent further paying out of the anchor cable. ment of the rod D2 can take place only after the cable drum has made a predetermined number of revolutions, owing tothe 86 fact that the said rod is at other times obstructed b v a spring controlled plunger D3.

whose upward or liberating movement is prevented by a nut D4 on the spindle A2 of the drum: when however the latter has 90 made a certain nuniber of revolutions the nut D4 moves clear of the plunger D, the latter is displaced its spring out of the path of the rod D2 and the latter can then "move as aforesaid to liberate the pawl B when the plummet or sounding ball ureaches the sea bed.

What I claim and desire to secure by f Letters Patent of the United States isz- 1. In a submarine mine anchor, the combination with the cable drum. of a brake pawl, a stop pawl and a bracket on which both said pawls are mounted to form a single unit.

2. In a submarine mine anchor. the com? 10|! bination with the cable drum. of a brake pawl, a stop pawl, and a controlling spring common to both pawls.

3. In a submarine mine anchor. the com` bin-ation with the cable drum, of a brake The said move- V pawl, a stop paWl, tail pieces on said pawls, and a spring interposed between said tail pieces.

4. 1n a submarine mine anchor, the combination with the cable drum, of a brake pawl, a stop pawl, a bracket on which both pawls are mounted, tail-pieces on said pawls, and a spring interposed between said tail-pieces.

5. In a submarine mine anchor, the combination with the cable drum; of a brake pawl, a stop paw] and a toothed flange of said drum with which flange both pawls engage.

6. In a submarine mine anchor, the combination with the cable drum and the stop vpawl for engaging with said drum, of a sliding rod',V means whereby the weightof a plummet or sounding ball holds said rod 1n a position to prevent the pawl from engaging with said drum, and means for moving said rod, when the plummet or sounding ball reaches the sea bed, into a position to permit the pawl to move into engagement with said drum.

7. In a submarine mine anchor, the combination with the cable drum and the stop pawl for engaging with said drum, of a notched sliding rod, means whereby the weight of a plummet or sounding ball holds said rod in a. position to prevent the pawl from engaging with said drum, and means for moving said rod, when the plummet or sounding ball reaches the sea bed, into a position to bring the notch in said rod opposite the pawl.

GIOVANNI EMANUELE ELIA. 

